Hull-board construction



J. E. MITCHELL AND D. PARKS.

HULL BOARD CONSTRUCTION.

APPLICATION FILED MAR. I5. 1919.

Patented Mar. 9, 1920.

2 SHEETS-SHEETI "M l I l. E. MITCHELL AND D. PARKS.

HULL BOARD CONSTRUCTION.

APPLICATION FILED MAR. I5. |919.

1 332, 9 l 3 Patented Mar. 9, 1920.

2 SHEETS-SHEET 2.

' UNITED STATES PATENT-crucis.

p j Joan n. meenam. ,AND DENNIS PARKS, ors'r. Louis, mssouar.

IIULLoAnooNsTnUeTIoN.

4 ToaZZ whom itlmogl/,concerm /Be it known that we, JOHN E. MITCHELLuseful Improvements in Hull-Board Construction, of which the followingis a specifiv cation.

ventors, John E. Mitchell.

This invention relates to a boll breaking and cotton separating machine,and has for its general object an improved construction of. hull boarddesigned in operation to facilitate the process of separating the cottonfrom the bolls and hulls and to preventl congestion in the workingchamber `of the machine. The invention also has for its object toprovide means for separately delivering the waste, consisting of hullsand trash, and the unopened bolls Vand wads of cotton, passing from theworking chamber so that the latter may be subjected to further treatmentto secure the recovery of substantially all of the available cotton fromthe product fed into the machine.

The diliculty of adjustingthe lower edge of the hull board suiiicientlyclose to thesaw cylinder to prevent cotton passing through with thehulls and trash without, at the same time, causing a congestion in 'theworking chamber by reason of large hull particles and unopened bollsbeing unable to escape from the chamber, has been pointed out` by-us inprior cases. To overcome this objection, the double hull boardconstruction described and claimed in Patent No. 1,030,913, dated July2, 1912 was devised by one of the present in- The present inventionillustra-tesY another means of accomplishing such purpose while at thesame time enabling the use of a simpler construction of machine` in thatonly a single hull board is employed.- The present machine also permitsthe recovery of a very high percentage of cotton, in that provision ismade for insuring the separation of the hulls and trash, and anyunopened bolls and cotton passing from the machine, so that the latter,as stated, may be subjected to further treatment.

The invention is illustrated in the accompanying drawings in which:

' Figure 1 is a cross sectional view of the machine constructedaccording to our invention; and

Fig. 2 is a broken view in rear elevation Specication of Letters'Patent.

Patentedl Mar. 9, 1920.

Application led Iarch 15, 1919. Serial 110.282,91).

of the hull. board and parts immediately associated therewith.

Referring'now to the drawings, the nu- 4mounted feed rolls 3. Below therolls 3 'is rotatably mounted a boll breaking cylinder 4, which is'artially inclosed by means of a casing mem er 5 and a screen 6, athroat, or passage, 7, being provided at the bottom of the chamberformed by the members 5 and 6 for the escape from the boll breakingchamber`of the mixed cotton and hulls produced by the action of thebreaking cylinder 4 on the bolls thrown into the hopper. Rotatablymounted in the casing below the boll-breaking chamber is a saw cylinder8, 'a kicker roll 9, and a doifer roll 10, the construction andoperation of whichvare well known, and need not be particularlydescribed. The passage'7 from the bell-breaking chamber communicateswith a working chamber 1l, where the mixed cotton, hulls through by thesaw cylinder and removed by the doier roll, andv unopened bolls, andhulls and trash, being knocked back by the kicker roll. Coperating withthe saw cylinder 8, is a hull board 11, which extends below the screen6, its lower edge 12 being positioned suiiicientlyclose` to the sawcylinder to prevent the escape of cotton/ through the space 13 provided,while permitting the escape of the greater portion of the hull particlesand trash. As frequently happens, however, a certain number ofunopened-,bolls will pass into the working chamber, having failed :to bebroken up by the breaking cylinder 4, and these are too large to passthrough the space 13 between the lower edge of the hull board and thesaw cylinder. Also some of the hulls will not be' b-roken apart, and thesize of these bodies is such as to prevent them from passing through thepassage 13. Such unbroken bolls, unseparated hulls, and pieces of trash,would ordinarily, with lthe use of a single hull board, adjusted asdescribed, collect in the working chamber and sooner or later cause thesame to-be congested. To

obviate this result, we provide one or moreother large bodies whichcannot escape from the machine through the regular space 13, between thebottom of the hull boardand the saw cylinder. Such larger opening, oropenings, are provided by cuttinv one or more recesses 14 in the loweredge o? the hull board, which open into the passage 12, and

conveyer 17, and arrange the passage 13 to' communicate with a chamber18, in the bottom of which is a conveyer 19, the chambers 16 and 18being separated by a partition 20. The chutes 15 pass through an upperinclined portion ofthe partition, as shown. The chutes 15 have sidewalls 15, and the upper ends of these chutes entirely inclose therecesses 14, so that the product passing through these recesses ismaintained separate from the product passing through the space 13.

In the operation of the machine, the cotton will be caught up by the sawcylinder 8, and trash and all hulls which have been broken apart, orseparated from each other,

will escape through the passage 13 into 'the chamber 18. Any unbrokenbolls in the working chamber above the saw cylinder are moved around, orback and forth, by the operation of the saw cylinder very rapidly Withinthe Working chamber, and, therefore, soon fall, or escape, through theopenings 14 in the bottom of the hull board andare discharged by thechutes 13 into the chamber Y 16. This will occur to a greater or'lessextent even with a single opening, and in practice, therefore, it hasnot been found necessary to provide very many of the openings 14. threeof-such openings being usually suiicient. The width of the recesses 14may vary, but ordinarily ve inches would be the maximum Width.

It will be obvious that the bottom edge of the hull board 11 can be setso as to permit a free discharge of hulls through the space 13 withoutpermitting the escape of any cot ton of value with the same into thechamber 18, whereas an occasional lock, orl Wad, of cotton may fallthrough the larger spaces provided by the recesses 14 with the unbrokenbolls into the chamber 16. The hulls comparatively free from cotton inchamber 18 are discharged by the conveyer 19 to thev hull pile, whilethe unbroken bolls and the small amount of cotton passing into thechamber 16, are carried out of the machine by the conveyer 17, andeither conducted to a separate re-cleauer, or returned with the bulk ofcotton going to the main battery of the machine.

1. A boll breaking and cotton separating machine affording a workingchamber, a saw cylinder operating in said chamber, a hull boardcoperating with said saw cylinder and providing different sizes ofopenings past the same for the escape of waste and other products fromthe working chamber, and means for separately delivering the productspassing through the different openings.

2. A boll breaking and cotton separating machine affording a workinchamber, .a saw cylinder operating in said chamber, a hull boardcoperating with said saw cylinder having its lower edge defining thesize of a passage past said saw cylinder and provided wit a recessafordin an enlarged opening past said saw cylin er, said passage andopening affording means of escape ',for waste and other vproducts :fromsaid working chamber, and a chute leading from said recess, whereby toseparately deliver the products passing; through said recess from theproducts passing through the smaller space provided by the remainder ofthe bottom edge of the hull board.

3. A boll breaking and cotton separating machine' affording a working.vchamber, a saw cylinder operating in said working chamber,a hull boardcoperatin with said saw cylinder having its lower e ge portion deningthe size of a passage past said saw cylinder and provided with aplurality of recesses aording enlarged openings ast the saw cylinder,said passage and openings affording means of escape for Waste and otherproducts from said working chamber, a chute secured about each one ofsaid recesses for conducting away the products passing through suchenlarged openings, and means for maintaining separate such products fromthose passing through the assage provided by the remainder of the hullboard.

4. A boll breaking and-cotton separating machine having a casingproviding in its bottom two separated compartments and affording aworking chamber, a saw cylinder operating in said chamber, a hull boardcooperating with the saw cylinder and having its lower edge portiondefining'the size of a passage past said saw cylinder communicating withone of said compartments, said passage affording means of escape forwaste from the working chamber, and said hull board being provided inits lower edge portion with a .recess affording an enlarged opening pastthe saw cylinder for the escape chamber, and a chute leading from saidrecess to the other compartment.

5. A boll breaking and cotton separating machine comprising a casingaffording avWorlnng chamber and havlng 1n lits bottom two conveyersseparated by a'partition, a saw cylinder operating in said chamber, ahull-board coperating with said saw cyll inder, and having its loweredge defining board being provided in its lower edge portion with arecess affording an enlarged opening past said saw cylinder for theescape of relatively large bodies from said Working chamber, and a chutehaving its upper end inclosing the bottom of said re' cess and its lowerend extending throu h said partition and communicating With t e otherconveyer.

In testlmony whereof, We have hereunto set our hands. l,

JOHN E. MITCHELL. DENNIS PARKS.

